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Areoligera lemniscata
From Fensome et al., 2019:
Areoligera lemniscata (Stanley, 1965, p.229–230, pl.24, figs.1–6) Stover and Evitt, 1978, p.18. Holotype: Stanley, 1965, pl.24, figs.1–2. Originally Cyclonephelium, subsequently (and now) Areoligera. Age: Paleocene.
Locus typicus: South Dakota, USA
Stratum typicum: Palaeocene
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Original description as Cyclonephelium lemniscatum: [Stanley, 1965, p. 230]:
Description:
Cyst flattened, outline in polar view circular with sculptured elements distributed in equatorial region; diameter 68-79 µm. Cyst wall approximately 0.5 µm thick, surface of shell finely pitted with lumina under 0.5 µm in diameter. Sculpture elements consist of ribbon-like to thread-like elements that are fused with adjacent elements in their central region leaving both the distal and the proximal ends free; length of elements about 25 µm. A more or less distinct opening may be present by the detachment of one end of the cyst (the apical archaeopyle).
Affinities:
The moderately long ribbon-like sculpture elements readily distinguish C. lemniscatum from other previously described species.
Areoligera lemniscata (Stanley, 1965, p.229–230, pl.24, figs.1–6) Stover and Evitt, 1978, p.18. Holotype: Stanley, 1965, pl.24, figs.1–2. Originally Cyclonephelium, subsequently (and now) Areoligera. Age: Paleocene.
Locus typicus: South Dakota, USA
Stratum typicum: Palaeocene
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Original description as Cyclonephelium lemniscatum: [Stanley, 1965, p. 230]:
Description:
Cyst flattened, outline in polar view circular with sculptured elements distributed in equatorial region; diameter 68-79 µm. Cyst wall approximately 0.5 µm thick, surface of shell finely pitted with lumina under 0.5 µm in diameter. Sculpture elements consist of ribbon-like to thread-like elements that are fused with adjacent elements in their central region leaving both the distal and the proximal ends free; length of elements about 25 µm. A more or less distinct opening may be present by the detachment of one end of the cyst (the apical archaeopyle).
Affinities:
The moderately long ribbon-like sculpture elements readily distinguish C. lemniscatum from other previously described species.